scsi: ipr: Use vmalloc_array() to simplify code

Use vmalloc_array() instead of vmalloc() to simplify the function
ipr_alloc_dump().

Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
Link: https://lore.kernel.org/r/20250806124633.383426-2-rongqianfeng@vivo.com


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>